It is covered in coffee stains and cigarette burns and could do with being tuned.
In normal circumstances this battered upright piano would sell for only a few hundred dollars.
But the Challen instrument is expected to fetch £150,000 (approximately $290,000) when it is auctioned because it was played by the Beatles on some of their most famous tracks.
They used it on Paperback Writer, Tomorrow Never Knows, Old Brown Shoe and Ob-La-Di, Ob-La-Da when they recorded at Abbey Road Studios in North-West London.
The piano was retired in 1980 and obtained by the current owner, who is selling it at a Bonhams auction at Goodwood in West Sussex on August 15. Also in the sale are copies of The Beatles Book magazine, which include photographs of Paul McCartney at the piano.